fix: escape brackets in Rich console output to prevent markup interpretation (#370)

Rich interprets `[text]` as markup, so brackets in commands like
`agent-cli[extras]` were being stripped from output. This escapes
brackets to display them literally.

Author: basnijholt

agent_cli/dev/cli.py

@@ -176,6 +176,8 @@ def _info(msg: str) -> None:
     # Style commands (messages starting with "Running: ")
     if msg.startswith("Running: "):
         cmd = msg[9:]  # Remove "Running: " prefix
+        # Escape brackets to prevent Rich from interpreting them as markup
+        cmd = cmd.replace("[", r"\[")
         console.print(f"[dim]→[/dim] Running: [bold cyan]{cmd}[/bold cyan]")
     else:
         console.print(f"[dim]→[/dim] {msg}")

agent_cli/install/extras.py

@@ -68,7 +68,9 @@ def _install_via_uv_tool(extras: list[str], *, quiet: bool = False) -> bool:
     if quiet:
         cmd.append("-q")
     # Use stderr for status messages so they don't pollute stdout (e.g., for hotkey notifications)
-    err_console.print(f"Running: [cyan]{' '.join(cmd)}[/]")
+    # Escape brackets to prevent Rich from interpreting them as markup
+    cmd_str = " ".join(cmd).replace("[", r"\[")
+    err_console.print(f"Running: [cyan]{cmd_str}[/]")
     result = subprocess.run(cmd, check=False)
     return result.returncode == 0